Yahoo answers: Is Kennedy's disease more common in some populations than others?

The questions pretty well explains what I mean. I just need to do research on Kennedy's disease and I was having a hard time finding answers on this. But thank you in advanced.

04/27/11

Biology

Kennedy's disease is a rare disease, with only one in 50,000 males affected and no particular pattern among various races or ethnic groups.
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Latest news about kennedys disease

When Presidential Brains Go Awry: Neuro Disorders In The Oval Office

Silvestri says there's evidence that John Adams, Jefferson, Lincoln, Dwight Eisenhower and John F. Kennedy suffered from migraines. James Madison and FDR probably had seizure disorders, Silvestri says. From his college years, Madison was known to
Source: http://commonhealth.wbur.org/2015/02/presidential-neurologic-disorders

The Orwellian Campaign To Project Anti-Vaccination Onto Republicans

The leaders of the anti-vax movement are not fundamentalists, or even right-wing libertarians, but Democrats like leftist environmentalist Robert F. Kennedy Jr., who in a 2013 speech likened vaccination to “Nazi death camps” and said vaccine proponents
Source: http://thefederalist.com/2015/02/13/the-orwellian-campaign-to-project-anti-vaccination-onto-republicans/

Ruth Bader Ginsburg 'Wasn't 100 Percent Sober' at State of the Union

“Before we went to the State of the Union, Justice Kennedy brought in…it was an Opus something or other, very fine California wine, and I vowed this year, just sparkling water, stay away from the wine,” Ginsburg reportedly said. “But in the end, the
Source: http://kticradio.com/abc_politics/ruth-bader-ginsburg-wasnt-100-percent-sober-at-state-of-the-union-abcid35230572/

And there is a reason I keep on my desk a copy of Attorney General Robert Kennedy's approval of J. Edgar Hoover's request to wiretap Dr. King. The entire application is . In discussions afterward with the press, he talked about the fact that the
Source: http://jaybookman.blog.ajc.com/2015/02/12/to-fbi-director-james-comey-thank-you/

Kennedy's disease is a rare inherited neuromuscular disorder that causes progressive weakening and wasting of the muscles, particularly the arms and legs. http://www.betterhealth.vic.gov.au/bhcv2/bhcarticles.nsf/pages/Kennedy's_disease

Kennedy's Disease Information Page: National Institute of ...

Kennedy's Disease information page compiled by the National Institute of Neurological Disorders and Stroke (NINDS). http://www.ninds.nih.gov/disorders/kennedys/kennedys.htm

Kennedy’s Disease - Motor Neurone Disease Association

Since the disease is compatible with normal life span and patients can be mis-diagnosed with motor neurone disease, an accurate diagnosis using http://www.mndassociation.org/Resources/MNDA/Life%20with%20MND/Information%20Sheet%2002%20-%20Kennedys%20Disease.pdf

Kennedy Disease - About

Kennedy disease is caused by a genetic defect on the X (female) chromosome. Since males have only one X chromsome, they are most severely affected by the disorder. http://rarediseases.about.com/od/rarediseasesk/a/072404.htm

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The Kennedys, who headline, will play music from their 2012 album ... Rogers explained. "'Porcelain disease' is about living in your own world," said the rocker, whose day job is working with a nonprofit real estate company that builds homes for the ...

It was a meticulously crafted piece of oratory that dramatically announced a generational change in the White House and called on the nation to combat “tyranny, poverty, disease, and war itself.” Kennedy wrote his thoughts in his nearly indecipherable ...

Biafra has still been keeping busy and his work with the Guantanamo School of Medicine brings back the frantic snark that the Dead Kennedys were oh so great at shoving in our faces. “Hollywood Goof Disease” is off the band’s latest album ...

Kennedy’s most closely guarded secrets: The dashing Massachusetts senator, so famous for his vigor, suffered from Addison’s disease and might die without constant maintenance doses of cortisone. Even a small infection could turn fatal ...

Heart disease killed a 64-year-old passenger on a cruise ship ... boarded it to interview several passengers before they could disembark, Wolf said. Kennedy's body was taken to the office of the chief medical examiner in Baltimore, which ...